Adjustment-micrometer for spark-coils.



E. B'. JACOBSON. ADJUSTMENT M'IGROMBTBR-FOR SPARK GOILS. A I APPLIOATION FILED NOV. 19, 1907. y 968,358, f Patented Augf.;4 23, 1910.

2 SHEETS-SHEET 1,

' .4 TTORNEY,

E. B. JAGoBsoN. `AJJJls'rMBNT MIGROMBTBR POR SPARK cous. v APPLICATION FILED Nov. 19, 1907. Y 968,358, l A Patented Aug.23,1910.

2 SHEETS-SHEET 2.

IN VEN T OR.

Edward BJ acobson ATTORNY. -f

UNrrED sriirnsrarnivr EDWAD B. JAcoBsoN, orl rrTTsrIELD'j MAssAoHsf-arrs, Assieivoa' 'ro' 'JAooBsoN- y BRANDOW coMPANmorrrrrsFIELn MASSACHUSETTS; A'coa`i=omif-r1o1vori/nasse* y f f onusnrrs.

To allwh'om it may concern.' *.5

Be it known 'that I, EDWARDB. JACoBsoN,

. a-citiz'en' of theUnited States, .and a resident of Pittsfield, in the county of Berkshire and State ofMassachusetts, have invented cere tain nevsT and useful1mprovementsin Ad-j 'justment -lMicrometers for Spark-LYCoils, of

Whichthe following-.is -a specica-tion..v This inventionl relates .to induction coil apparatus-and.particularly to=.'vibrat0r d e-. vices." commonly employedv in Viggnition ,sys-,

tems for@ internal. combustion engines.

A principal Voloj ect of itheinvention is the provlsion of improved-meansffor accurately adjusting andindicating the'relative posl-v tions-of contact-points inapp'aratusof the character.: described.. And vWith this andotheri-objects in? view my invention consists in certain features of.constructiom arrangementfandf combination.pofp`arls as hereinafter described and claimed,-,reference being had to the drawings, foi-nung `a part ofthis specification,. in `which corres' Vonding parts faredesignated by .similar re eren'ce `charac.

ters nieach; of the views and vWhich- .I v L Figure 1 'represents'.[ani.exteriorA face' view,

of an -inductionjcoil box, ,1 1, any approved construction showing s1d e{ view,A o

ed thereon ;f. Eiglf-Q, aview Similar `to Fia 1J aordingl; a rear yievv .'Of'imyl device; fFigs. 3,] and 4,4 respective!tojv-iwsqoffthe parts, 2 g1 thefvibratlleY .ele-lv shownI in Figsi, 1 an mentbeing represented fin f4 as shifted lateralfljyfrom- 4 its ,normal o -era'tivev position Fig. 5,.alongitudinal sectlon'al viewlof my' i andFig, 6abottjom view' o ftheffree en d of the supporting-arm, 22',"s ,hovving the for1na'. tion and engagement ofl the lower yextre'n'nty of the c ore,.2, adaptedlgtoa .corresponding recess'provded inthe. Said atm; Figs-...5 andV l 6 being-detail views on anenlarged scale.-

vide afrigid metallic supportingfarm, 22, forv attachment at one end 'to a fixed supportand contaming mechanismforthe proper Asupport and adjustment 'of a `(':ontact-polnt, 25,

L mechanism "comprises al vertical stem or shaft, 26, provided with ama- I applicati@meaNovember 19, 1907.l serla`1 `1tlj iozgsoe.

.31PM-M "ferred formaof; my l deviceoperatively mountscale of the flange.'

' ADJUST'MENTLMIJCBOMETER Fon sPARK-co 1rs..

i nipulative vvnurl head, l, at lits iipperlexif tremity and acontact-point, 25,. of platinum -or other .suitable conductive" substance se ycured toV its 'lower extremity, said shaft being removably inclosedin a bushing or hol- Specieation of Letters Patent. I' AugfZSi'l-Q, i

provided Ontheinterior surface yof the core Said core, 2, is designed to seated,`wl1ereby the core when actuated ver? tically is prevented from rotating.4 Actuat@ and preferably at theupper end thereof and ,on the shaft. .move vertically, upcr down, Within a re`- volving'Worm-gear, V18, having an extended f .bearing provided interiorly with la screwlthread adaptedto `engage with a correspond* ing vthread. v'on .the exterior surface of the'. 1 core. The core orbushingf2is provided at`v its lower end with .opposed flatsiwhichjeni gage corresl ondimi;l plane faces forming sides'of ia Spt opening. into the v'pocket in the arm 22, in' which Vthe Worm Wheel is ing thesaid Worm-gear, I8, andinengagef.

ed to revolve Withiny a circular transverse recess inthe Wallof the receptacle head, '.245 .Movably enveloping'the extended fend'of lthe' Worin-gear bearing and holding the sjame :in an upright operative position lisan outer lock-casing, 27, secured 'between 'the said bearing A` and thewallof the receptacle'head, u24, byxneans of a lscrew-thread provided exv teriorly vcirc'umferentially of Vthe lcasing and adapted'to engage with a 'corres' ending' threadfprovided vonv interior Wa l of the said head, 24. Thel said casing is' further ment therewithv isa ZWorm,l0, provided With` I l a yman i'pulativ e nurl head, 6, and construct- .30w

sey

provided Aabout the upper yextremity thereof I l' 'ivitha vgrooved flange or shoulder, 4', formi f ing acover for the receptacle head. Upon pressed or otherwise' representednumerical and other characters systematically arnthe'`to`p"', surfaceof the said flange are im-j eral arm 'or pointer, 3, projecting freely overv thev impressed surface of flange, 4, in such manner as to operate as an index to the The supporting arm, `22,31s securedrin` rigid' p'ositionpreferably by means ofvv a metallic bridge, 7 ,placed freely .othvvart the low, movable core, 2, and engaged thereivith go' rear end of the vibratile element and se-,

cured to the insulated cover, 9, ofthe coilbox, 11, by means of screws, 8, passed through corresponding recess rovided in the .top of the bridge and firm y 'securedin position thereon by meansof bevel-headedscrews adapted-to engage withA threaded apertures provided in the bridge adjacent eit er side ot the arni22.

It will'be apparentthat my device' forms part of an electric circuit and that the several parts composing the same and forming a J free pathifor the current'are, where not hereinbefore specifically mentioned, constructed of metal or of some other suitable conductive substance. 4 lThe operation of my device may be described as follows z-If the contact-points 16 and-25 are found to be'separated by 'an air space by which the current would be interrupted the point 2'54 is so vadjusted by means of my device that the points will-be- 'brought -in slight contact sufficient to allow a' free path for the passage of the-current.`

r This is done .by the rotation of the nurl head, 6, unon the worm, 10, which in turn.

revolves tie worm-gear, 18, in engagement therewith. 4This operation causes the core,l

2, supporting the shaft 26, and in engagement with thebearing of the worm-gear to rise or fall according to the rotation of the to the scale the extentv of vertical movement l head 6. The core 2 is prevented from rotat- 35.

ing, when actuated vertically by the worm-- gear, by the formation'of its lower end in engagement with the slot vprovided in lthe vrarm 22, as previously described. .Upon the revolution' of .the worm-gear. the pointer, 3, supported thereon is rotated over thedial on the shoulder 4:, indicating by reference of the core 2, and hence the contact-point 2'5.

As the utility and eiiiciency of my deviceand others of the same 'general class consists chiefly 1n the correct adjustment and' the' stationary position when in use of the upper contact-point, 25, I have specially designed thev mechanism-controlling this part with a view to the attainment of the merits referred to. of knowing the exact position of the con-y tact-point, 25, when properly adjusted relatively to the point on the vibratile element,

and this advantage is attained by means of the'scale and pointer. By means of my device the contact-pointjis adjusted with great It is desirable'to have means claim as new and desire to secure byLetters Patent v 1. In induction-coil apparatus, an adjustable contact-point, a movable member su porting` the contact-point and adaptedl to e removed therewith and re laced without requiring readjustment, an means for measuring the extent of movement of the contact point. f

2. In induction-coil apparatus, an adjust-4 able contact-point, a movable member supporting the contact-point, and separate means in addition to said contact-point and ysaid .supporting member forv indicating the justment of the contact-point with` correct a out requiring the rotation 'thereo 3; In induction-coil ap aratus,.the comblmeans inaddition to sai contactoint and a movable member supporting sai contactpoint 'and adapted to be removed therewith and restored to its original osition without requiring readjustment of t econtactoint,

of means provided separately from sai l con-pk tact-point-supportmg member for actuating n the contact-polnt longitudinally. n 4. In/induction-coil apparatus, the comblnationof an adjustablecontact-'point, amovable member supportingfs'aid contact-point and adapted 4to be removed therewith and restored to original position without requiringreadjustment, means for adjusting saidv contact-point -with reference to a separate venting said 'adjusta le contact-point from being rotated.

5. In-induction-coil apparatus, the combination of an ladjustable contact-point, a-movable member supporting the contact-,point and adapted to be removed therewithand revcontact-point, and se arate means for pre-` l oint and said supporting member for ad'-,

justment without rotating the same.

6z In inductlon-coil. apparatus,the combination of an adjustable contact-point, amovvable member supporting the contact-point and .adapted to bevre'moved therewith and replaced without requiring readjustment,

and means for indicating the correct adjustment of the contact-point-.- n

7. In induction-coilapparatus, the combi-'.

nation ofan adjustable contact-point, a movable member y supporting the contact-point and adapted to be removed'therewith and replaced without requiring readjustmentxandmeans for measuring the extent of movement of-the contactoint when adjusted comprising a fixed sca e` and a movable index for registering therewith.

8,: In in action-coil apparatus, in combinatlon a support, a tubular exteriorlythreaded core, a shaft projecting through the coreand movably engaged therewith, saidv shaft being provided at one end'with a contact-point and adapted to be removed there-v '15 contact-point from being rotated.

10. In amake and break device, the combinationwith a contact-point adapted to be removed and replaced without requiring re- Hadjufstment, means for the support of the contact-point, and a worm and worm-gearV coperatively actuating said contact point supporting means, -of separate means for measuring the extent.' of movement of the contact-point. v

l1. In a make and breakdevice comprising an adjustable contact-point adapted to be removed Aand replaced without requiring readj ustment, micrometer mechanism for actuating said point toward or, away from a' 3 0 separate adjacently disposed contact-point,

A record 'of Athe case inthe Patent Office.

Correction in Letters Patent No. 96S,-358.

should be read with this correction therein that .the

Signed and sealed this'QOth .day of September, A. 1910.-

means for preventing the adjustable contact-. point.' from being rotated, vand separate means for measuring they extent of move' ment of the adjustable contact-point. s

- 12. In induction-coil apparatus, the com- A bination of a rigid support having a slotted aperture therein, `a movable core carried byg f said support vand having one end seatedin said aperture whereby the core is prevented from being rotated, a stem-member projecting through the core in engagement therewith and provided at one end with a con- I tact-point, and means for actuating the .core and stem-member longitudinally for adjust- "ment of the contact-point with' reference to- 4'5 a separate contact-point.

13. In inductioncoil apparatus, the combination 'with a support having a recess, therein, lof va contact-point, mechanism for adjusting said contact-'point with reference 5o .to'a separate contact-point and adapted tol fit into the recess in saidsup ort, and locking means for securing said a justingmechanis'm in normal operative position. In testimony whereof I have axed mysignature, in presence of two witnesses.'

EDWARD B. J ACOBSON l Witnesses: 'CARL E. Cozzro,

"JAMES DIXON.

I. Itis hereby certified that in Letters PatentNo. 968,358, granted August`2"3,19l0,

' upon the application of-jEdward B. Jacobson, of Pittsfield, Massachusetts', for'an improvement in Adjustment-Micrometers for Spark-Coils,-fan error appears in the printed'specification requiring correction follower' Page f2,line` 8`3, the 'words means in addition to saidshould be stricken out andthe words and :syllables y 4muti-0n with., an, adjustable'be inserted instead; and that the said Letters Patent same may conformy tothe o. o. 4vB1LLINGs'-,

' Acting ommz'ssz'oner of Patents. I' 

